lib: config: new option 'cupt::console::actions-preview::show-empty-versions'
debian: changelog: 2.9.0: added missing dashes
test: TestCupt: enabled 'show-empty-versions' option
test: manage: autoremoval: added
test: manage: autoremoval: never-autoremove-setting: added
test: manage: autoremoval: no-if-rdepends-setting: added